MSD Servo Drive AC-AC Operation Manual
moog
27
Id. no.: CA65642-001 Date: 03/2012
[
Installation
]
3.7.2 Connection of AC mains supply
Step
Action
Comments
1.
Determine the cable cross-section,
depending on maximum current and ambi-
ent temperature.
Cable cross-section acc. to local
and country specific regulations
and conditions.
2.
Wire the servo drive according to its size
and type of connection. For cable lengths in
excess of 0.3 m use shielded cables!
3.
If necessary wire the mains choke, see section
Reduces the voltage distortions
(THD) in the net and prolongs the
lifetime of the servo drive.
4.
Install a K1 circuit breaker (power circuit
breaker, contactor, etc.).
Do
not yet switch
on
the AC
mains supply!
5.
use mains fuses (duty class gG, see table 3.7),
which will isolate all poles of the servo drive
from the mains supply.
For compliance with the equipment
safety act acc. to EN 61800-5-1
DANGER CAuSED BY HIGH VOLTAGE!
Danger to life! Never wire or
disconnect electrical connections while these are live. Always isolate the
device from the mains supply before working on it. Even 30 minutes after
switching off the mains supply dangerously high voltages ≥ 50 V may still be
present (capacitor charge). Therefore check for isolation from supply!
ATTENTION!
Should local regulations require the installation of a residual
current protective device (RCD), the following applies:
In case of a fault the servo drive is able to generate DC fault currents without
zero crossing. Servo drives therefore must only be operated with residual
current protective device (RCDs) type B for AC fault currents, pulsating or
smooth DC fault currents, which are suitable for servo drive operation, see
IEC 60755. Residual current monitoring devices (RCMs) can additionally be
used for monitoring purposes.
!
Please note:
•
Switching the mains power:
− In case of too frequent switching the unit protects itself by high-resistance
isolation from the system. After a rest phase of a few minutes the device is
again ready for operation.
•
TN network and TT network: Operation is permitted if:
− with single-phase devices for 1 x 230 V AC the supply network corresponds
with the maximum overvoltage category III in accordance with EN 61800-5-1.
− with triple-phase devices with phase-to-phase voltages 3 x 230 V AC,
3 x 400 V AC, 3 x 460 V AC and 3 x 480 V AC
1.
the neutral point
of the supply net
is grounded
and
2. the supply net meets the requirements of the maximum 2. overvoltage
category III in accordance with EN 61800-5-1 under a system voltage
(external conductor
→
neutral point) of maximum 277 V.
•
IT-network: not permitted!
− In case of an ground fault the electrical stress is approx. twice as high.
Clearances and creepages acc. to EN 61800-5-1 are no longer maintained.
•
Connection of the servo drive via a mains choke is mandatory:
− where the servo drive is used in applications with disturbance variables
corresponding with environment class 3, as per EN 61000-2-4 and higher
(hostile industrial environment).
− for compliance with EN 61800-3 or IEC 61800-3, see appendix.
•
For further information on current carrying capacity, technical data and
environmental conditions please refer to the appendix.
NOTE:
Please note that the MSD Servo Drive AC-AC has not been designed
for environment class 3. Further measures are mandatory in order to achieve
this environment class! For further information please consult your project
engineer.
Содержание G392-004
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